/*++

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are permitted provided that the following conditions are met:

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this list of conditions and the following disclaimer in the documentation
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Abstract:

NMR_PortableZIPWriter.h defines a portable stream to write into ZIP files

--*/

#ifndef __NMR_EXPORTSTREAM_ZIP
#define __NMR_EXPORTSTREAM_ZIP

#include "Common/NMR_Types.h"
#include "Common/Platform/NMR_ExportStream.h"
#include "Common/Platform/NMR_PortableZIPWriter.h"
#include "Libraries/zlib/zlib.h"

#include <array>

#define ZIPEXPORTBUFFERSIZE 65536
#define ZIPEXPORTWRITECHUNKSIZE 1048576

namespace NMR {

	class CExportStream_ZIP : public CExportStream {
	private:
		CPortableZIPWriter * m_pZIPWriter;
		nfUint32 m_nEntryKey;
		z_stream m_pStream;
		std::array<nfByte, ZIPEXPORTBUFFERSIZE> m_nOutBuffer;

		nfBool m_bIsInitialized;

		nfUint32 writeChunk(_In_ const nfByte * pData, nfUint32 cbCount);
		void finishDeflate();
	public:
		CExportStream_ZIP() = delete;
		CExportStream_ZIP(_In_ CPortableZIPWriter * pZIPWriter, nfUint32 nEntryKey);
		~CExportStream_ZIP();

		virtual nfBool seekPosition(_In_ nfUint64 position, _In_ nfBool bHasToSucceed);
		virtual nfBool seekForward(_In_ nfUint64 bytes, _In_ nfBool bHasToSucceed);
		virtual nfBool seekFromEnd(_In_ nfUint64 bytes, _In_ nfBool bHasToSucceed);
		virtual nfUint64 getPosition();
		virtual nfUint64 writeBuffer(_In_ const void * pBuffer, _In_ nfUint64 cbTotalBytesToWrite);

		void flushZIPStream();
	};

	typedef std::shared_ptr <CExportStream_ZIP> PExportStream_ZIP;

}

#endif // __NMR_EXPORTSTREAM_ZIP
